US 8,942,606 B2Granted

Image forming apparatus using a developer image carrier moving in a predetermined direction

AssigneeOki Data Corporation

InventorYoshitaka Miyazaki

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Abstract

An image forming apparatus that transfers a developer image onto a sheet and forms the developer image on the sheet includes a developer image carrier, a first pressing member, a transfer member, a first voltage supply, and an adherence part. The developer image carrier holds the developer image and moves in a predetermined direction in which the sheet is being carried. The first pressing member presses against the developer image carrier from a side opposite to a side on which a developer image is held. The transfer member is arranged against the first pressing member through the developer image carrier, the first pressing member and the transfer member being responsive to a first voltage applied therebetween to transfer the developer image from the developer image carrier toward the transfer member. The adherence part adheres the sheet to the developer image carrier upstream the first pressing member in the predetermined direction.

Claims19

Dependent claims

An image forming apparatus that transfers a developer image onto a sheet and forms the developer image on the sheet, comprising:

a developer image carrier configured to hold a developer image and move in a predetermined direction;
a first pressing member configured to press against the developer image carrier from a side thereof opposite to a side thereof on which the developer image is held;
a transfer member arranged against the first pressing member through the developer image carrier, said first pressing member and said transfer member being responsive to a first voltage applied therebetween to transfer the developer image from the developer image carrier toward the transfer member;
and
an adherence part configured to adhere a sheet to the developer image carrier upstream of the first pressing member in the predetermined direction, the adherence part including:
a second pressing member arranged upstream of the first pressing member in the predetermined direction and configured to press the developer image carrier from said side thereof opposite to the side thereof on which the developer image is held,
an auxiliary member arranged upstream of the transfer member in the predetermined direction, and
a carrying member arranged between the transfer member and the auxiliary member and configured to carry the sheet therewith in the predetermined direction, wherein
the auxiliary member presses the second pressing member through the developer image carrier and the carrying member,
the first pressing member presses the transfer member through the developer image carrier, and
a pressure formed between the auxiliary member and the second pressing member is less than a pressure between the first pressing member and the transfer member.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/431,962Filed 27 Mar 2012
Priority: JP 2011-06941728 Mar 2011
Published: US 2012/0251199 A14 Oct 2012
Granted: 27 Jan 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G03G 15/167
By introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat:…
G03G 15/0189
Using more than one reusable electrographic recording member, e.g. one for every monocolour image: primary transfer to an intermediate transfer belt
G03G 15/235
By inverting and refeeding the image receiving material with an image on one face to the recording member to transfer a second image on its…
G03G 2215/0129
The linear arrangement being horizontal or slanted: horizontal medium transport path at the secondary transfer